"After installing SP1 on my Vista Home Premium, Computer is running faster but,
boot up is slower. I haven't changed anything to make boot up run slower. Does
anyone have any info. to help speed up the boot since installing SP! ?"

and microsoft gave me several ways to help speed the boot when I hit on uninstalling
Avast Antivirus! After I get to the desktop window, it boots up like old times.

Now using AVG antivirus and no problems with it.

When first turning on computer, the vertical bars scrolling across screen are more
and taking longer. Can anyone give me a clue to shorten the scrolls...now some 27 to 30 times.

i sent my laptop to the store where i bought it, i've been having stop errors (blue screens) on it prior and after installing SP1. before i sent it, i did a recovery of my system and installed SP1, but still encountered a stop error.

according to the tech, the stop error has something to do with SP1, i'm not sure about all the details yet, because we just talked on the phone. i'll try to get the details when i pick up my laptop later.

There maybe cases where SP1 causes Blue Screen Errors (though I haven't seen any from SP1) but the cause can't be SP1 if they happen without SP1 installed.
If you list what error message and file name are displayed on the Blue Screen I can try to help figure out what is causing it.

i don't have the exact details at the moment, but from what i remember, the error was from win32k.sys. i tried to google the error, and from what i found the possible sources that the error might've come from are: faulty/insufficient RAM or faulty OS installation. some of my other 'geeky' friends said that it could also come from the HD, although they say it's just a possibility. btw, i made a thread about my error, but it seems we came to a little dead-end: win32k.sys stop error, any possible solutions?

Ok. I didn't realize that this and the other threads where related to the same problem.
I would say if doing a recovery that wipes the disc and returns to the factory install doesn't stop the error then it's unlikely it's a bad OS install.
It's probably something hardware related like the RAM or hard drive.
Unfortunately, there is isn't much way to know for sure what hardware if any is causing the problem without just replacing a part and seeing what happens.

Basically those tools write to the RAM certain values, reads them back and compares if they match.
They do this a few times with different values and on all parts of the RAM in case it's only a certain part that is bad.
If the correct value isn't returned then something is wrong.
This usually indicates bad RAM though it can be other things like overclocking or overheating can cause the RAM to not run right.

I don't know of a tool like that for video cards.
There are a couple things you can check related to overheating:
1. You can use a program that tells you the temperature of the computer and make sure it's within normal range.
2. Look at all the fans on the computer and make sure they are not covered with dust.

@Pipo, The reboot cycle refers to constant rebooting during the SP1 installation. At least that's how I read it. I don't think it refers to Stop Error.
CoreTemp is neat for controlling the CPU temperature. When it's up, minimize it and the temperature measurement appears in the system tray. http://www.alcpu.com/CoreTemp/

Well like most people my boot time has gone up, "Go make yourself a cup of tea while you are waiting" gone up.

The other thing I have noticed is that my recycle bin icon is not updating properly. If I empty the bin it will often stay looking like it is full. Once the icon disappeared altogether when I emptied the recycle bin.